// Thud - a dynamic object-oriented language
// Copyright (C) 2009,2010 David H. Hovemeyer <david.hovemeyer@gmail.com>

// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
// 
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.
// 
// You should have received a copy of the GNU General Public License
// along with this program.  If not, see <http://www.gnu.org/licenses/>.

/*
 * FileOutputStream.cpp
 *
 *  Created on: Dec 15, 2009
 *      Author: dhovemey
 */

#include <cstring>
#include <cerrno>
#include "util/Error.h"
#include "util/String.h"
#include "util/IOException.h"
#include "util/EOFException.h"
#include "util/FileOutputStream.h"

FileOutputStream::FileOutputStream(FILE *out)
	: m_out(out)
	, m_error(false)
{
}

FileOutputStream *FileOutputStream::open(const std::string &fileName)
{
	FILE *out = fopen(fileName.c_str(), "wb");
	if (out) {
		return new FileOutputStream(out);
	} else {
		std::wstring msg(L"Could not open ");
		msg += String::fromUtf8(fileName);
		msg += L": ";
		msg += String::fromUtf8(strerror(errno));
		Error::raise(new IOException(msg));
		return 0;
	}
}

FileOutputStream::~FileOutputStream()
{
	if (m_out) {
		fclose(m_out);
	}
}

bool FileOutputStream::write(int c)
{
	char buf[1];
	buf[0] = c;
	return write((const void *) buf, 1) == 1;
}

size_t FileOutputStream::write(const void *buf, size_t n)
{
	size_t rc = fwrite(buf, 1, n, m_out);
	if (rc < n) {
		// Incomplete write: indicates either an error or EOF
		checkError();
	}
	return rc;
}

bool FileOutputStream::atEOF()
{
	return feof(m_out);
}

bool FileOutputStream::error()
{
	return m_error;
}

bool FileOutputStream::checkError()
{
	if (ferror(m_out)) {
		Error::raise(new IOException(String::fromUtf8(strerror(errno))));
		m_error = true;
	}
	return m_error;
}

